444450638 has 4 divisors (see below), whose sum is σ = 666675960. Its totient is φ = 222225318.

The previous prime is 444450637. The next prime is 444450649. The reversal of 444450638 is 836054444.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444450637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111112658 + ... + 111112661.

It is an arithmetic number, because the mean of its divisors is an integer number (166668990).

Almost surely, 2^444450638 is an apocalyptic number.

444450638 is a deficient number, since it is larger than the sum of its proper divisors (222225322).

444450638 is a wasteful number, since it uses less digits than its factorization.

444450638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222225321.

The product of its (nonzero) digits is 184320, while the sum is 38.

The square root of 444450638 is about 21081.9979603452. The cubic root of 444450638 is about 763.1463732780.

The spelling of 444450638 in words is "four hundred forty-four million, four hundred fifty thousand, six hundred thirty-eight".